A method of configuring a plurality of parameters of a lighting device

ABSTRACT

A method of configuring a plurality of parameters of a lighting device ( 320 ); wherein the plurality of parameters are configurable in a configuration mode and in an augmented reality mode; wherein the method comprises the steps of: selecting, in the configuration mode, a configuration set comprising at least one of the plurality of parameters of the lighting device; adjusting, in the configuration mode, the at least one of the plurality of parameters of the selected configuration set; switching to the augmented reality mode upon adjustment of the at least one of the plurality of parameters of the configuration set in the configuration mode and/or based on a user input; rendering, in the augmented reality mode, a virtual model of the lighting device on an image rendering device ( 330 ) as an overlay on a view of a physical environment ( 310 ); wherein the model of the lighting device comprises the adjusted at least one of the plurality of parameters of the configuration set; automatically selecting, in the augmented reality mode, a augmented reality subset of the plurality of parameters of the lighting device; and automatically adjusting, in the augmented reality mode, parameters of the selected augmented reality subset based on environmental information of the physical environment upon switching to the augmented reality mode, wherein the augmented reality subset of the one or more parameters comprises one or more dimensional physical parameters of the lighting device, and wherein the physical parameters comprise parameters related to the physical properties of the lighting device.

FIELD OF THE INVENTION

The invention relates to a method of configuring a plurality ofparameters of a lighting device; wherein the plurality of parameters areconfigurable in a configuration mode and in an augmented reality mode.The invention further relates to a system and a computer program productfor configuring a plurality of parameters of a lighting device.

BACKGROUND

A luminaire is a device or structure arranged to emit light suitable forilluminating an environment, and comprises at least one light source orlamp, such as an LED-based lamp etc., optionally with any associatedsupport, casing or other such housing. Each of the luminaires may takeany of a variety of forms, e.g. a ceiling mounted luminaire, awall-mounted luminaire, a wall washer, or a free-standing luminaire (andthe luminaires need not necessarily all be of the same type).

Design of such a luminaire is an art. A configuration system or simply aconfigurator guides a user to select one or more design parameters, suchas shape, type, size etc. of the luminaire. Different variations ofconfigurators comprise representing, visualizing, assessing, and pricingwhich starts a learning-by-doing process for a user. The configurator,for the most part in a technical sense, is a software tool. In a typicalluminaire configurator, a user can select a luminaire design and adjustcertain parameters of it. The user may, for example, adjust theluminaire's color, its surface pattern, its shape, its light bulb, etc.

WO 2019/228969A1 discloses an electronic device (1) which is configuredto obtain an image (49) of at least part of an environment, the imagebeing captured with a camera, and determine a potential location for alighting device (15,17) by analyzing the image. The electronic device isfurther configured to analyze a plurality of temporally sequentialsegments of content (41) being rendered or to be rendered by theelectronic device and/or by a content rendering device (19) located inthe environment, determine a virtual dynamic light effect (45,47) basedon the analysis and the potential location determined for the lightingdevice and display the virtual dynamic light effect superimposed over aview on the environment while the content is being rendered. A currentpart of the virtual dynamic light effect corresponds to a currentsegment of the content.

SUMMARY OF THE INVENTION

The inventors have realized that, with current configurators, it isdifficult for users to imagine how their luminaire design will actuallylook in their own environment (e.g. in user's home, office etc.). Theinventors have further realized that with this limitation, a luminairedesign which seems optimal for a user in the configurator may still be apoor design when placed in its target location in the user environment.

It is therefore an object of the present invention to provide animproved configurator to obtain an optimal luminaire design.

According to a first aspect, the object is achieved by a method ofconfiguring a plurality of parameters of a lighting device; wherein theplurality of parameters are configurable in a configuration mode and inan augmented reality mode; wherein the method comprises the steps of:selecting, in the configuration mode, a configuration set comprising atleast one of the plurality of parameters of the lighting device;adjusting, in the configuration mode, the at least one of the pluralityof parameters of the selected configuration set; switching to theaugmented reality mode upon adjustment of the at least one of theplurality of parameters of the configuration set in the configurationmode and/or based on a user input; rendering, in the augmented realitymode, a virtual model of the lighting device on an image renderingdevice as an overlay on a view of a physical environment; wherein themodel of the lighting device comprises the adjusted at least one of theplurality of parameters of the configuration set; automaticallyselecting, in the augmented reality mode, a augmented reality subset ofthe plurality of parameters of the lighting device; and automaticallyadjusting, in the augmented reality mode, parameters of the selectedaugmented reality subset based on environmental information of thephysical environment upon switching to the augmented reality mode.

The method provides configuration of a plurality of parameters of alighting device in a configuration mode and in an augmented realitymode. In the configuration mode, a configuration set comprising at leastone of the plurality of parameters may be selected. The at least one ofthe plurality of parameters of the selected configuration set may bethen adjusted in the configuration mode. The selection and/or theadjustment may be a manual process, e.g. based on a user input or may bean automatic process. A hybrid approach of manual and automaticselection/adjustment may also be possible in the configuration mode.

The method further comprises, upon adjustment of the at least one of theplurality of parameters of the configuration set in the configurationmode, switching to an augmented reality mode. Additionally, and/oralternatively, the switching may be based on a user input. In theaugmented reality mode, a virtual model of the lighting device may berendered on an image rendering device as an overlay on a view of aphysical environment, e.g. home, office etc. The rendered virtual modelof the lighting device comprises the adjusted at least one of theplurality of parameters of the configuration set. This enables a user tovisualize how the lighting device will appear at a possible targetposition in user's environment.

In the augmented reality mode, an augmented reality subset of theplurality of parameters may be automatically selected and furtherautomatically adjusted based on environmental information of thephysical environment. The environmental information may comprisedimensions and/or layout of the physical environment, for instancelayout or dimensions of the room in a house, arrangement of furniture inuser's room etc. Therefore, the method not only allows a user tovisualize the lighting device in user's environment but also theautomatic selection and adjustment based on the user's own environmentalinformation provides an improved method of configuring a luminairedesign.

In an embodiment, the augmented reality subset of the plurality ofparameters may comprise one or more dimensional physical parameters ofthe lighting device.

The dimensional physical parameters may comprise, for instance,dimensions of the lighting device, dimensions or shape of a lightingdevice part, cord length of the lighting device etc. This is beneficial,because the lighting device, in the augmented reality mode, isautomatically adjusted to fit the user's physical environment.

In an embodiment, the configuration set, and the augmented realitysubset of the plurality of parameters may be non-overlapping.

In an example, the parameters of the augmented reality subset maycomprise dimensional physical parameters such that, for instance, theparameters may be automatically adjusted in the augmented reality mode,whereas the at least one of the plurality of parameters of theconfiguration set may comprise non-dimensional parameters such as color,surface pattern or light source type of the lighting device. This isadvantageous because it simplifies user selection. In this example, onlythose parameters which are not selected/adjusted in the configurationmode are then selected/adjusted in the augmented reality mode.Alternatively, the configuration set and the augmented reality subsetmay have overlapping parameters based, e.g., on a selection from a user.

In an embodiment, the configuration set, and/or the augmented realitysubset of the plurality of parameters may be predetermined.

The parameters in the configuration set and augmented reality subset maybe predetermined such that a user selection is further simplified.

In an embodiment, the method may further comprise: receiving a userpreference input from a user indicative of: the selection and/or theadjustment of the at least one of the plurality of parameters of theconfiguration set; and/or the selection and/or the adjustment of theparameters of the augmented reality subset.

This embodiment enables a user-interactive configuration setup for thelighting device design. User preferences are received for theselection/adjustment of one or more parameters. In an example, the imagerendering device may provide a user interface to receive the userpreference input. Additionally, and/or alternatively, a configurationdevice may be arranged for receiving a user preference input for theselection/adjustment of the at least one of the plurality of parametersin the configuration mode. In another example, the image renderingdevice may be arranged for receiving a user preference input for bothconfiguration and augmented reality modes. In an example, the userpreference input is received via a voice command.

In an embodiment, the plurality of parameters of the lighting device maycomprise physical parameters and light emission parameters; wherein thephysical parameters comprise: color of the lighting device, surfacepattern, shape, size, type, a light source type of the lighting deviceor its parts and/or cord length; and wherein the light emissionparameters comprise: light color, color temperature, intensity, beamwidth, beam direction, beam shape, light output distribution and/orlight emission intensity. In an embodiment, the method may furthercomprise determining if a combination of a user adjusted light emissionparameters and physical parameters is infeasible; and automaticallyadjusting, in the augmented reality mode, the light emission and thephysical parameters for a feasible combination.

A user preference may result in an infeasible combination of physicalparameters and light emission parameters. For example, a user selectedlight source (e.g. the light bulb or module) or the lighting device typecannot provide a user selected illuminance level. In such cases, themethod may advantageously automatically adjust, in the augmented realitymode, the light emission and the physical parameters. For example, theilluminance level may be automatically adjusted such that the userselected light bulb may provide such illuminance level. Optionally, userfeedback may be provided to indicate the adjustment (and optionally itsrationale) to the user, which could be done by rendering a visualindication or by providing an auditory (spoken) output. The selection oflight emission parameters may be defined in terms of (or in order toachieve) an illuminance level in the physical environment, illuminancelevels on the table, light spot shape on the wall etc.

In an advanced embodiment, a priority value may be assigned to the userpreference input, such that the user assigns a priority to hisselection. For example, the user may assign a low priority value to alight source selection and high priority value to the illuminance level.In this case, the method may select/adjust a different light sourcewhich may provide the user selected illuminance level.

In an embodiment, the method may further comprise obtaining, in theaugmented reality mode, a depth map or a 3D model of a viewed area inthe physical environment.

The image rendering device may have means to receive a depth map or a 3Dmodel of the viewed area in the physical environment. The imagerendering device may receive the depth map or the 3D model from one anexternal device (e.g. in cloud) or an internal device (e.g. physicalpresent in the physical environment such as lighting device, sensoretc.). It helps to realistically adjust the lighting device dimensions,scale and orientations, with respect to the physical environment. It mayfurther enable calculating how a particular light setting of thelighting device effects the physical environment.

In an embodiment, the method may further comprise determining a positionof the virtual model of the lighting device in the physical environmentbased on the plurality of parameters of the lighting device and/or on auser input.

The position of the virtual model may be advantageously automaticallydetermined by, for instance, using an image of the physical environmentand analyzing characteristics, such as dimensions and lay-out of thephysical environment. For example, a pendant ceiling lamp may bepositioned in the center of the ceiling or may be centered above a deskor table. Additionally, and/or alternatively, a user may indicate theposition of the virtual model based on his preference.

In an embodiment, the augmented reality mode, the adjustment of theparameters of the selected augmented reality subset may occur uponreceiving a user acceptance of the position of the virtual model of thelighting device in the physical environment.

A correct position of the virtual model is important for the adjustmentof the plurality of parameters of the lighting device. Therefore, inthis advantageous embodiment, the automatic adjustment in the augmentedreality mode may occur once the user accepts the position of the virtualmodel. Such user acceptance may be derived from an explicit confirmationinput from the user or may be derived from other inputs such as theuser's gaze or facial expression or from detected movements of theconfiguration device.

In an embodiment, the method may further comprise receiving a signalindicative of a position and/or an orientation information of the imagerendering device; and switching to the augmented reality mode based onthe received signal.

For instance, switching to the augmented reality mode may take placewhen the image rendering device is moved up or hold substantiallyvertical, while switching back to the configuration mode may take placewhen the image rendering device is held substantially horizontal. In ananother example, switching to the augmented reality mode may be based onswitching of a display of the image rendering device from landscape toportrait orientation.

According to a second aspect, the object is achieved by a system forconfiguring a plurality of parameters of a lighting device; wherein thesystem comprises: an image rendering device according to the firstaspect; a configuration device; one or more controllers arranged forexecuting the steps of the method according to the first aspect.

In an example, a signal indicative of a position and/or an orientationinformation of the configuration device may be received; and wherein andswitching to the augmented reality mode may be based on the receivedposition and/or the received orientation information of theconfiguration device.

According to a third aspect, the object is achieved by an imagerendering device for configuring a plurality of parameters of a lightingdevice; wherein the image rendering device comprises: a display arrangedfor displaying a virtual model of the lighting device as an overlay on aview of a physical environment; a processor arranged for executing themethod steps according to the first aspect. In an example, the processormay be arranged for executing (at least) the method steps of selectingand/or adjusting parameters of the augmented reality subset in theaugmented reality mode according to the first aspect.

According to a fourth aspect, the object is achieved by a configurationdevice for configuring a plurality of parameters of a lighting device;wherein the configuration device comprises: means for receiving a userpreference input from a user indicative of a selection and/or anadjustment of the at least one of the plurality of parameters of theconfiguration set in a configuration mode; a processor for executing themethod steps of selecting and/or adjusting the at least one of theplurality of parameters of the configuration set in the configurationmode according to the first aspect.

The one or more controller according to the second aspect may beimplemented in a unit separate from the image renderingdevice/configuration device, such as wall panel, desktop computerterminal, or even a portable terminal such as a laptop, tablet orsmartphone. Alternatively, the one or more controller may beincorporated into the same unit as the image rendering device and/orconfiguration device. Further, the one or more controllers may beimplemented in the physical environment or remote from the environment(e.g. on a server of the building or even outside the building at adifferent geographical site); and the one or more controller may beimplemented in a single unit or in the form of distributed functionalitydistributed amongst image rendering device and configuration device.Furthermore, the one or more controller may be implemented in the formof software stored on a memory (comprising one or more memory devices)and arranged for execution on a processor (comprising one or moreprocessing units), or the one or more controllers may be implemented inthe form of dedicated hardware circuitry, or configurable orreconfigurable circuitry such as a PGA or FPGA, or any combination ofthese.

According to a fifth aspect, the object is achieved by a computerprogram product comprising instructions which, when the program isexecuted by a computer, cause the computer to carry out the steps of themethod of the first aspect.

It should be understood that the computer program product, the systemand the devices may have similar and/or identical embodiments andadvantages as the above-mentioned methods.

BRIEF DESCRIPTION OF THE DRAWINGS

The above, as well as additional objects, features and advantages of thedisclosed systems, devices and methods will be better understood throughthe following illustrative and non-limiting detailed description ofembodiments of systems, devices and methods, with reference to theappended drawings, in which:

FIG. 1 shows schematically and exemplary an embodiment of a system forconfiguring a plurality of parameters of a lighting device;

FIG. 2 shows schematically and exemplary a flowchart illustrating anembodiment of a method for configuring a plurality of parameters of alighting device;

FIG. 3 shows schematically and exemplary an embodiment of a method forconfiguring a plurality of parameters of a lighting device; and

FIG. 4 shows schematically and exemplary an image rendering deviceaccording to an embodiment of the method.

All the figures are schematic, not necessarily to scale, and generallyonly show parts which are necessary in order to elucidate the invention,wherein other parts may be omitted or merely suggested.

DETAILED DESCRIPTION OF EMBODIMENTS

FIG. 1 shows schematically and exemplary an embodiment of a system 100for configuring a plurality of parameters of a lighting device 120. Thesystem 100 comprises an environment 110. For example, the environment110 may comprise a room in a house, an office, a restaurant etc. Theenvironment 110 may comprise furniture 113, which is shown as a sofa 113in this figure. The furniture 113 may be of any type as commonly foundin the room/office such as table, chair, sleeping bed etc. Theenvironment 110 may further comprise lighting devices 115 a-b. In thisexemplary figure, only two standing lamps are shown as the lightingdevices, any number and/or type of the lighting devices 115 a-b may belocated in the environment 110. The environment 110 may furthercomprise, though now shown in FIG. 1 , HVAC devices, sensors, electronicdevices such as laptop, television etc. Any other devices appropriate tothe type of environment 110 from/office/restaurant etc.) is notexcluded.

The system 100 may further comprise an image rendering device 130. Inthis exemplary figure, the image rendering device 130 is a smartphone.Other examples of the image rendering device 130 may comprise laptop,tablet, camera or any wearables such as glasses. The image renderingdevice 130 may comprise a display 135 and (optionally) means forreceiving a user preference input such as a user interface (not shown).The image rendering device 130 may be an augmented reality compatibledevice, such that the image rendering device 130 may comprise all thehardware, for instance, a processor, GPS, a display, camera, microphoneetc., which is required for augmented reality. A user 140 may view theenvironment 110 in the display 135 of the image rendering device 130.The view may be a digital view (e.g. via an augmented reality enabledcamera) or an optical view (e.g. via a wearable glasses).

The user 140 may want to select and configure a new lighting device 120intended to be placed in the environment 110. The user 140 may render avirtual model of the lighting device 120 on the image rendering device130 as an overlay on a view of the (physical) environment 110. Theplurality of parameters of the lighting device 120 may be configuredusing the method as discussed later.

FIG. 2 shows schematically and exemplary a flowchart illustrating anembodiment of a method 200 for configuring a plurality of parameters ofa lighting device 120. The plurality of parameters may be configurablein a configuration mode and in an augmented reality mode. The pluralityof parameters of the lighting device 120 may comprise physicalparameters and/or light emission parameters. The physical parameters maycomprise parameters related to the physical properties of the lightingdevice 120 such as color of the lighting device, surface pattern, shape,size, type, a light source of the lighting device and/or cord length.The light emission parameters may comprise parameters related to thelight emission properties of the lighting device 120 such as light(emission) color, color temperature, intensity, beam width, beamdirection and/or light (emission) intensity. The physical parameters maybe further divided into dimensional physical parameters which maycomprise parameters related to the dimensions of the lighting device 120such as cord length, size of the lighting device shade or length of thelighting pole (when the lighting device 120 is of a floor lamp) etc.

The method 200 may comprise selecting 210, in the configuration mode, aconfiguration set comprising at least one of the plurality of parametersof the lighting device 120. The selection 210 may be a manual step, e.g.based on a user input or a predetermined selection. In an example, theconfiguration set may comprise all parameters of the lighting device120. The configuration set may comprise physical parameters and/or lightemission parameters.

The method 200 may comprise adjusting 220, in the configuration mode,the at least one of the plurality of parameters of the selectedconfiguration set. The adjustment 220 may be a manual step, e.g. basedon a user input or a predetermined adjustment. The steps of selection210 and/or adjustment 220 may be executed by a configuration device (notshown). The configuration device may comprise means for receiving a userpreference input from a user 140 indicative of a selection 210 and/or anadjustment 220 of the at least one of the plurality of parameters of theconfiguration set in a configuration mode. The configuration device maycomprise a user interface for receiving the user preference input. Theuser interface may allow user 140 to provide user preference input via avoice command. The configuration device may further comprise a processorfor executing the method steps of selecting 210 and/or adjusting 220 theat least one of the plurality of parameters of the configuration set inthe configuration mode.

The method 200 may further comprise switching 230 to the augmentedreality mode upon adjustment 220 of the at least one of the plurality ofparameters of the configuration set in the configuration mode and/orbased on a user 140 input. The switching 230 may be an automatic stepcarried out upon the adjustment 220 of the at least one of the pluralityof parameters of the configuration set in the configuration mode.Additionally, and/or alternatively, the switching 230 may be based on auser 140 input. The user 140 input may be received via the configurationdevice or via the image rendering device 130. In an example, theconfiguration device and the image rendering device 130 are comprised inone device. Alternatively, the configuration device may be differentfrom the image rendering device 130. For example, the configurationdevice may comprise a mobile touchscreen device, whereas the imagerendering device 130 may comprise a wearable glass device. In this case,the user preference input may be either received on the wearable glasses(e.g. voice commands, gestures in front of the glasses, or touch inputson the wearable device), or may be received on the mobile device suchthat the configuration of the lighting device 120 becomes distributedover both a handheld and a wearable device.

The method 200 may further comprise rendering 240, in the augmentedreality mode, a virtual model of the lighting device 120 on an imagerendering device 130 as an overlay on the (physical) environment 110.The model of the lighting device 120 may comprise the adjusted at leastone of the plurality of parameters of the configuration set.

In an example, a position of the virtual model of the lighting device120 in the physical environment 110 may be determined based on theplurality of parameters of the lighting device 120 and/or on a userinput. For example, a ceiling lamp is intended to be placed on theceiling. The user 140 may indicate an exact position in the ceiling. Inanother example, a study lamp is intended to be placed on a table. In anexample, a position of the virtual model may be further determined basedon an analysis of physical environment 110, e.g. room, dimensions andlay-out. For instance, a pendant ceiling lamp may be positioned in thecenter of the ceiling or may be centered above a desk or a table.

A position can also be determined based on the position of detectedexisting light sources 115 a-b or windows in the physical environment110. For instance, a floor lamp may be positioned in between twoexisting ceiling downlights, or the lighting device 120 may beautomatically positioned at a spot which looks relatively dark. In anexample, multiple determined positions may be indicated to the user 140,e.g. via the display 135 of the image rendering device 130. Forinstance, subtle markers may indicate alternative positions, or a user140 may browse through various positions by tapping the display 135. Theimage rendering device 130 may also detect a significant move of theimage rendering device 130 and may determine an alternative positionbased on the new image of the physical environment 110.

The method 200 may further comprise automatically selecting 250, in theaugmented reality mode, an augmented reality subset of the plurality ofparameters of the lighting device. In an example, the configuration setand the augmented reality subset of the parameters are non-overlapping.In other words, different parameters are selected/adjusted in theconfiguration and in the augmented reality mode. In this exampleparameters which are not selected/adjusted in the configuration mode areselected/adjusted in the augmented reality mode. In another example, theconfiguration set and/or the augmented reality subset of the pluralityof parameters are predetermined. The predetermined selection of theconfiguration set and/or the augmented reality subset may be based on auser 140 input.

The method 200 may further comprise automatically adjusting 260, in theaugmented reality mode, parameters of the selected augmented realitysubset based on environmental information of the physical environment110 upon switching to the augmented reality mode. In an example, ahybrid approach, in the augmented reality mode, of manualselection/adjustment and automatic selection 250/adjustment 260 may beused.

In an example, the augmented reality subset of the plurality ofparameters may comprise one or more dimensional physical parameters ofthe lighting device, which are automatically adjusted 260 based on theenvironmental information of the physical environment 110. In anotherexample, it is also possible to customize the mounting or placementsurface of the lighting device 120 to environmental information of thephysical environment 110. For instance, the size of the ceiling cap maybe automatically adjusted 260 to the size of a hole in the ceiling whichneeds to be covered. Or the finishing or material for the bottom side ofa table lamp may be adjusted if the lamp is positioned on a glass table(e.g. felt caps).

Furthermore, the lighting device 120 typically needs a power connection,and the image rendering device 130 may detect the position of poweroutlets in the ceiling or in the wall. The lighting device 120 may bepositioned at or near such a power outlet, or the parameters of thelighting device 120 may be adjusted 250 such that the power outlet canbe easily reached (e.g. cable length) or is covered by the lightingdevice 120 housing (e.g. an enlarged ceiling cap).

In an embodiment, if a combination of a user adjusted 220 light emissionparameters and physical parameters is infeasible; automaticallyadjusting 250, in the augmented reality mode, the light emission and thephysical parameters for a feasible combination. in the augmented realitymode, the adjustment of the parameters of the selected augmented realitysubset occurs upon receiving a user acceptance of the position of thevirtual model of the lighting device in the physical environment.

FIG. 3 shows schematically and exemplary an embodiment of a method forconfiguring a plurality of parameters of a lighting device 320. In step1 of configuring the plurality of parameters of the lighting device 320,the method steps of selecting 210 and adjusting 220, in theconfiguration mode, are exemplary shown to be performed via the imagerendering device 330. These steps may be performed via a configurationdevice. In these steps, the at least one of the plurality of parametersin a configuration set is selected 210 and adjusted 220. Differentoptions to select/adjust physical and/or light emission parameters areprovided. In step 2, the method steps of switching 230 to an augmentedreality mode and rendering 240 of a virtual model of the lighting device320 on the image rendering device 330 as an overlay on a view of thephysical environment 310 is exemplary shown. The rendered 240 virtualmodel of the lighting device 320 comprises the selected 210/adjusted 220at least one of the plurality of parameters in the configuration mode.The selection 210/adjustment 220 which may seem optimal in theconfiguration mode, which when rendered 240 as overlay on a view of thephysical environment 310 does not match the physical environment. Instep 3, the method steps of automatically selecting 250 and adjusting260, in the augmented reality mode, are exemplary shown. The automaticselection 250/adjustment 260 may be based on the physical environmentalinformation of the physical environment upon switching to the augmentedreality mode.

In an example, the method 200 may obtain, in the augmented reality mode,a depth map or a 3D model of a viewed area in the physical environment310, which helps to realistically adjust the lighting device 320dimensions, scale and orientations, but also enables calculating how aparticular light setting effects the physical environment 310. Forexample, the light setting which renders the light effects may furtherbe optimized to environmental information of the physical environment310 (e.g. room type, dimensions). Dimensions of the inner shape of thelighting device 320 may be automatically adjusted 260 to achieve adesired effect (e.g. illuminate an entire target surface, e.g. a dinnertable).

In another example, one or more parameters of the inner surface of thelighting device 320 may be automatically adjusted 260 in order toachieve a desired light distribution. For instance, the inner material,shape or finishing of a lamp shade or the shape of a reflector can beadjusted based on spatial properties of the target environment.Dependent on the luminaire position relative to its target surface theinner shape may be adjusted. For instance, if the lighting device 320 ispositioned above a circular table, the inner shape may be adjusted suchthat the entire table is uniformly lit. In the case, that the lightingdevice 320 is moved from a central to an off-center position, the innershape may be adjusted accordingly, resulting in an asymmetrical innershape which is able to realize a uniform light distribution on thetarget surface.

FIG. 4 shows schematically and exemplary an image rendering device 430according to an embodiment of the method 200. The image rendering device430 may comprise a display 415, which may be arranged to displayarranged for displaying a virtual model of the lighting device as anoverlay on a view of a physical environment. The image rendering device430 may have an imaging unit such as a camera (not shown) to capture animage of the physical environment 110, 310. The image rendering device130 may be an augmented reality compatible device, such that the imagerendering device 130 may comprise all the hardware which is required foraugmented reality.

The image rendering device 430 may comprise one or more user interfaceelements 437. In an example, the one or more user interface elements 437for selecting/adjusting the parameters of the configurationset/augmented reality subset may be rendered on the display 415. If, forexample, the size of the lighting device 120, 320 has been automaticallyadjusted 260 in the augmented reality mode, a size adjustment userinterface element 437 may be rendered enabling the user to furtheradjust the size. Other user interface elements 437 for adjusting otherparameters may not be visible on the display 415, or at least notdirectly adjustable. They may, for instance, be ‘hidden’ in a menu.

Additionally, the user interface for receiving selecting/adjusting ofthe parameters of the configuration set/augmented reality subset may bea voice-activated user interface. If the input is provided by a voicecommand, the type of command may be very much dependent on the mode itis in especially in relation to the context. E.g.: “make the luminairethe size of half the table's width”. In case of a multi-light pendant:“Give me the right number of heads to sufficiently light the table”. Or:“use the same color as the speaker next to the tv”.

The image rendering device 430 may further comprise a processor 433arranged for executing the method steps 210-260. Alternatively, theprocessor 433 may be arranged for (at least) executing the steps ofautomatic selection 250/adjustment 260 of the parameters of theaugmented reality subset in the augmented reality mode. The imagerendering device 430 may further (optionally) comprise a memory 431 maybe arranged for storing one or more of images of the physicalenvironment 110, 310, predetermined parameters of the configurationset/augmented reality subset, predetermined selection/adjustmentrecommendations etc.

The method 200 may be executed by computer program code of a computerprogram product when the computer program product is run on a processingunit of a computing device, such as the processor 433 of the imagerendering device 430.

It should be noted that the above-mentioned embodiments illustraterather than limit the invention, and that those skilled in the art willbe able to design many alternative embodiments without departing fromthe scope of the appended claims.

In the claims, any reference signs placed between parentheses shall notbe construed as limiting the claim. Use of the verb “comprise” and itsconjugations does not exclude the presence of elements or steps otherthan those stated in a claim. The article “a” or “an” preceding anelement does not exclude the presence of a plurality of such elements.The invention may be implemented by means of hardware comprising severaldistinct elements, and by means of a suitably programmed computer orprocessing unit. In the device claim enumerating several means, severalof these means may be embodied by one and the same item of hardware. Themere fact that certain measures are recited in mutually differentdependent claims does not indicate that a combination of these measurescannot be used to advantage.

Aspects of the invention may be implemented in a computer programproduct, which may be a collection of computer program instructionsstored on a computer readable storage device which may be executed by acomputer. The instructions of the present invention may be in anyinterpretable or executable code mechanism, including but not limited toscripts, interpretable programs, dynamic link libraries (DLLs) or Javaclasses. The instructions can be provided as complete executableprograms, partial executable programs, as modifications to existingprograms (e.g. updates) or extensions for existing programs (e.g.plugins). Moreover, parts of the processing of the present invention maybe distributed over multiple computers or processors or even the‘cloud’.

Storage media suitable for storing computer program instructions includeall forms of nonvolatile memory, including but not limited to EPROM,EEPROM and flash memory devices, magnetic disks such as the internal andexternal hard disk drives, removable disks and CD-ROM disks. Thecomputer program product may be distributed on such a storage medium, ormay be offered for download through HTTP, FTP, email or through a serverconnected to a network such as the Internet.

1. A method of configuring one or more parameters of a lighting device;wherein the one or more parameters is configurable in a configurationmode and in an augmented reality mode; wherein the method comprises thesteps of: selecting, in the configuration mode via a configurationdevice, a configuration set comprising at least one of the one or moreparameters of the lighting device based on user input; adjusting, in theconfiguration mode via a configuration device, the at least one of theone or more parameters of the selected configuration set based on userinput; switching to the augmented reality mode upon adjustment of the atleast one of the one or more parameters of the configuration set in theconfiguration mode and/or based on a user input; rendering, in theaugmented reality mode, a virtual model of the lighting device on animage rendering device as an overlay on a view of a physicalenvironment; wherein the model of the lighting device comprises theadjusted at least one of the one or more parameters of the configurationset; automatically selecting, in the augmented reality mode via theimage rendering device, an augmented reality subset of the one or moreparameters of the lighting device; and automatically adjusting, in theaugmented reality mode via the image rendering device, the at least oneof the one or more parameters of the selected augmented reality subsetbased on environmental information of the physical environment uponswitching to the augmented reality mode; wherein the environmentalinformation comprises dimensions and/or layout of the physicalenvironment; and wherein the augmented reality subset of the one or moreparameters comprises one or more dimensional physical parameters of thelighting device related to the dimensions of the lighting device, andwherein the physical parameters comprise parameters related to thephysical properties of the lighting device.
 2. The method according toclaim 1, wherein the configuration set and the augmented reality subsetof the plurality of parameters are non-overlapping.
 3. The methodaccording to claim 1, wherein the configuration set and/or the augmentedreality subset of the one or more parameters are predetermined.
 4. Themethod according to claim 1, wherein the method further comprises:receiving a user preference input from a user indicative of: theselection and/or the adjustment of the at least one of the one or moreparameters of the configuration set.
 5. The method according to claim 1,wherein the one or more parameters of the lighting device comprisephysical parameters and/or light emission parameters; wherein thephysical parameters comprise: color of the lighting device, surfacepattern, shape, size, type, a light source type of the lighting deviceand/or cord length; and wherein the light emission parameters comprise:light color, color temperature, intensity, beam shape, light outputdistribution, beam width, beam direction and/or light intensity.
 6. Themethod according to claim 5, wherein the method further comprises:determining if a combination of a user adjusted light emissionparameters and physical parameters is infeasible; automaticallyadjusting, in the augmented reality mode, the light emission and thephysical parameters for a feasible combination.
 7. The method accordingto claim 1, wherein the method further comprises: obtaining, in theaugmented reality mode, a depth map or a 3D model of a viewed area inthe physical environment.
 8. The method according to claim 1, whereinthe method further comprises: determining a position of the virtualmodel of the lighting device in the physical environment based on theplurality of parameters of the lighting device and/or on a user input.9. The method according to claim 8, wherein, in the augmented realitymode, the adjustment of the parameters of the selected augmented realitysubset occurs upon receiving a user acceptance of the position of thevirtual model of the lighting device in the physical environment. 10.The method according to claim 1, wherein the method further comprises:receiving a signal indicative of a position and/or an orientationinformation of the image rendering device; switching to the augmentedreality mode based on the received signal.
 11. A system for configuringone or more parameters of a lighting device; wherein the systemcomprises: an image rendering device; a configuration device; one ormore controllers arranged for executing the steps of the methodaccording to claim
 1. 12. An image rendering device for configuring oneor more parameters of a lighting device; wherein the image renderingdevice comprises: a display arranged for displaying a virtual model ofthe lighting device as an overlay on a view of a physical environment; aprocessor arranged for executing the method steps according to claim 1.13. A configuration device for configuring one or more parameters of alighting device; wherein the configuration device comprises: means forreceiving a user preference input from a user indicative of a selectionand/or an adjustment of at least one of the plurality of parameters of aconfiguration set in a configuration mode; a processor for executing themethod steps of selecting and/or adjusting the at least one of theplurality of parameters of the configuration set in the configurationmode according to claim
 1. 14. A computer program product comprisinginstructions which, when the program is executed by a computer, causethe computer to carry out the steps of the method of claim 1.